On Tue, 16 Dec 2003, Christian McArdle wrote:

Loss of a lighting circuit can be very dangerous, especially in a fire, or
whilst in a dangerous position, such as up a ladder.

Seems to me that the obvious solution is to have whole-house RCD
protection and install battery-backed emergency luminaires at e.g. stair
wells.

The ultra-cautious could have 30mA RCBOs protecting each circuit
separately.

--
Alistair Riddell - BOFH
Microsoft - because god hates us